| Post Office Name | US Post Office |
| Address | 915 Kosciusko Ave |
| City | Grenville |
| State | South Dakota |
| Phone Number | (605) 486-4804 |
| Latitude | 45.5048 |
| Longitude | -97.4238 |
57239 US Post Office in Grenville, South Dakota is located at 915 Kosciusko Ave. The Grenville Post Office Number is (605) 486-4804
